I am in the process of repairing even if to just sell a craftsman garden tiller I have. The drive chain broke. Long story short the “shear pins” in it don’t shear for crap. When I took it apart I found a broken chain like I was told I would find and then I found the drive gear said chain goes I has two teeth knocked off of it. Is it worth attempting to weld material to the gear and creating my own teeth or should I just send it?